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Finding the Fourth Proportional to 153,963.15, 212,562.93 and 105,644.45

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Solution

The fourth proportional to 153,963.15, 212,562.93 and 105,644.45 is: 145,853.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,963.15 : 212,562.93 = 105,644.45 : x
  2. Step 2: Convert to fraction form
    153,963.15/212,562.93 = 105,644.45/x
  3. Step 3: Cross multiply
    153,963.15x = 212,562.93 × 105,644.45
  4. Step 4: Simplify right side
    153,963.15x = 22,456,094,757.81
  5. Step 5: Solve for x
    x = 22,456,094,757.81/153,963.15
  6. Step 6: Final answer
    x = 145,853.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.